Pike County was the first county to be formed after Indiana became a state, in December of 1816. It was named for Zebulon Pike, famous for his Pike Expedition on 1806-1807, when he explored the southwest portion of the Louisiana Purchase. Petersburg is the county’s largest city and its County Seat. The landscape here varies from level to rolling with rich soils. The bottom lands of the White River, which forms the north boundary and the Patoka which flows through it’s center has rich soil that is very productive agriculturally and is also marked by great timber land. The Patoka National Wldlife Refuge and Management Area is located here.